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The true inventors of the 'sailplane'

richard

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In 1923 ,two men had paid a lot to protect their rights on this invention .
 

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airman

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Sailplane !? :D :D :D :D :D :D :D ;D ;D ;D ;D ;D ;D ;D :D :D :D :D :D
Sincerely i am happy for them if this invention remained @ state of project ! :D :D
 

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